Abstract: A changer device according to the present invention includes: a plurality of storage media; a magazine for holding the plurality of storage media; a plurality of drives for reading and writing data to storage media, each of these drive reading and writing data to a storage medium selected from the plurality of storage media; and a media transporting device transporting the selected storage medium to the drive as well as transporting the moved storage medium to the magazine. When a request to write data is issued, the data and parity data are stored in a striped manner on the plurality of storage media at the plurality of drives. If data cannot be read or written to a storage medium at one of the drives, the media transporting device transports an operational storage medium to this drive. Then, using the storage media at the drives, the data on the failed storage medium is reconstructed. This reconstructed data is stored on the operational storage medium.

Abstract: An information reference method includes a computer, a storage unit for storing display information to be processed by the computer, a display unit for displaying display information stored in the storage unit, and an indication unit for indicating any desired point on the screen of the display unit. The information reference method comprises a step for displaying a portion of display information stored in the storage unit, a step for indicating any desired point of a display image on the screen by the indication unit, and a step for selecting one of a plurality of display information linked in advance to a displayed image. The information retrieval method further comprises a step for providing, within display information, link information for showing the degree of relevancy between a displayed image and the plurality of display information, and a step for mutually comparing link information at an indicated point to decide display information to be selected.